NEET UG BIOLOGY MCQ: BREATHING AND EXCHANGE OF GASES

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For increasing efficiency of Lungs, respiratory surface should have following features except

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Correct option: D

Always in direct contact with source of oxygen

Option D (Always in direct contact with source of oxygen) is correct because while proximity to oxygen is important, direct contact is not always necessary, especially in organisms with circulatory systems.

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External gills, tracheae, and lungs all share which of the following sets of characteristics? A person suffers punctures in his chest cavity in an accident, without any damage to the lungs its effect could be Among vertebrates, …A… use gills whereas reptiles, birds and mammals respire through the …B… . Amphibians like frogs can respire through …C… also. Mammals have a well adapted respiratory system
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